Gert,
When I decided to get into the networking field, I knew that MTU was the bane of
the industry, I just did not realize I'd still be dealing with it years later :)
EoMPLS hell, indeed.
If Ytti's reading, I'd like to know what those details are too. Right now I
have 7600/RSP720's in the core, not the edge, so it is of limited use to me
right now, but it's worth knowing, especially when I roll out VPLS.
I *do* wish that I could change the MTU of SVI's on the 3750 Metro, like I can
do on the 7600/RSP7200 SR train. *hint hint*..
Anyway, thanks all :)
-- Stephen
Gert Doering wrote:
Hi,
On Sat, Nov 15, 2008 at 11:58:07AM -0500, Stephen Fulton wrote:
MTU: local 9000, remote 1500
Welcome to EoMPLS hell.
If MTUs do not match, the VC won't come up. And you can't change the
"raw" MTU on a dot1q subinterface.
I seem to remember that there is a knob in recent SR* IOS trains that
permits you to ignore MTU mismatches, but I have forgot the details - Ytti
will know all the details (how to configure it plus availability).
Workaround: make sure the "base interface" MTU is the same on both sides
("gig 0/1", with no ".123").
gert
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